Rotary pump



Nov. 1,1192?.v4 642309 H. H.REX

'ROTARY PUMP /17 l "ZZ 'il mlm! HARRY H. Rnx, .oR 'YARI MA, WASHINGTON, vAssIeNoR'oR. ONE-,THIRD To' ANDREW sLAvIN AND INGTON.

Appneatibn' aieaiue as,

This invention relates to an improved rotary pump, andseeks, among other objects,

to provide a device of this character, pecul- .-iarly applicable for :service in any` instance- The invention seeks, as a 'nrther object,- to provide apump which',-wh1lebe1ng par-:

.10 ticularly designed for pumping liquids, may

alsobeemployed for -compressing air.

A A still further obiect Vof the invention is to provide a pump which, when -in operation; will delivera practically continuous stream.

l object, to provide apump which will be sturdy in itsv construction, whichv may be` readily taken apart or assembled,nd which will bel composed of a minimum number of 2o' parts consistent with entire efficiency.

` Other objects of the invention not'specifically mentioned in the iore'eoing will appear A during the course of'the'following description.. A

In the accompany drawings; U Figure 1 is a 'side elevation' of my 1mproved pump. j Figure 2 is a transverse vertical sectional view through the device.,v Figure'3 is a sectionalvi'ew on the line 3-3 of Figure '2, looking in the directlon indicated by 'the arrows.

Figure 4 1s a sectional -view on the line 4 4 of 'Figure 3looking inthe direction I indicated by the arrows.

Figure v5 is a detail sectional view show'- "ing a slightly modified form of piston head(- In carrying the invention into edect, I .employ a cylindrical center block or stator 10, and formed in the block arel radial cylinders 11', the block being cored .out between the cylinders as indicatedffat l2. In the present instance, I have shown the block as provided with four but, of course,4

the number of cylinders employed may be varied as desired'. Formed in the .blockto l communicate with the inner ends ofthecylinders are inlet passages 13 opening through one side of -the block centrallyl thereof, and 5l? leading from the inner ends of the cylinders are discharge passages 14 Opening through the other side of thel block central y thereof,

-it being'observed that the outer end portions Vaxis of the block.

vAnd the invention seeks, as a still further' said gear for driving the rotor.

chamber. v u

the'bloclz are cap bolts or other suitable fas- S5 ONE-THIRD To FRANCIS R. sLAv1N, ROTH 'or' YAKnuA, WASH.

I v `ROTARY PMR l 192e.' bserial 'No.n'rsss.

of all of said`passages are tilted toward the l ,4 At suitably spaced points about the periphery'thereof the block 10 is, as p'articularlyseen in'Figuresl 3 and 4, providedwith transverse-. sockets 15 in which are mounted rollers 16, and rotatably supported 60 by said rollers to freely turnabout the block is the rotor employed. -This rotor .comprises a shell which is formed-.of mating side plates 1 17, and extending vtransversely through the platesk at the outer peripheral margins .there- 05 l of are spaced bolts 18 securing the plates Ato.-

gather. At their innerperipheries, the plates are provided with 4lateral ilanges19 to coact'with the'rollers- 16 and more orlessf closely surround the block 10, while, at their outer peripheries,the' plates are formed with c Vmating portions of a circumferential gear 20 extending around therotor. In use, af suitable drive pinion, such as conventionally illustrated at- 21. is arranged'to coact with"my As particularly seen in Figures 3 and 4,- the side .plates 17 aire'cut away to define an internal Yannular chamber 22 concentric to the axis'of the blocklO, and tittingthe peripheryl of said block are companion guide members 23 formed at their ends to deine pairs of radial guides v2li tting. in said Securing the guide members to tening devices 25 so that, as will be seen', the

.guide vmembers-.will thus serve to lockthev rotorv against lateral displacement from'thebloclr'and.. as will be observed, the guide members are of a length to extend betweeh the cylinders 11 so that the pairs of guide members 24 are thus 'located at opposite sides* of said-cylinders respectively. Formed in. the side plates 17 of the rotor shell are oppositely disposed intern-a1 grooves 26wl1'ich @5f are eccentrically located with respect to the,A axisof the block.

Mountedto reciprocate in the cylinders 11 are the pump pistons. .These pistons; include piston lrods 27 provided at their outer ends' 100 with T-shaped heads 28 which slidably fit v between the pairs of guides 24, andl extend- -ing vtransversely through said heads, as seen in Figure 2,- are pins-'29 `upon the ends of which are 'journaled 'rollers 3()v more or less 195* gsnugly accommodated in the eccentric 3&5

grooves 26, the pins being fixed to the heads.

lOverlying the inner ends of the piston rods makes its inward stroke, fluid will enter t-he groove of the piston head for pressing the -lip thereofradially outward -in tight contact with the cylinder wall.

In Figure 5, I have illustrated a slightlymodified form of vpiston head 36 which. if found advantageous, Inayibe lused in lieu y of the heads 32. The-piston head 36 is formed of suitable resilient material and cavity 37 defining alip 38 at the periphery of the head. Thus, as 4will be seen, when the A piston head 36 makes its inward stroke,

fluid will enterthe cavity 37 for expanding the lip 38 against the cylinder wall. Y.

Resting in suitable-seats at the outer ends of the intake passages 13 are valve cages 39 in which are mounted spring closed intake valves 40, and resting in suitable seats at the outer ends 'of the outlet passages 14 are cages 41 in which are mounted spring closed discharge valves 42, the cages being equipped with reversible valve seats 43 for said valves. Overlying the cages 39 is an intake manifold 44, and overlying the cages 41 is. a discharge manifold 45. Ylhese manifolds are provided with flat inner end walls 46 in which are provided seats for the outer ends of the valve cages, and formed through' said walls to communicate withsthe ports at the outerv ends of the cages are openings 47. As seen in Figure 1, the manifolds 44 and 45 are provided with peripheral flanges 48, and extending freely through said flanges are cap bolts 49 screwed at their inner ends into annular Hanges 5() on the ,center block 10.A Thus, the valve cages are rigidly clampedlbetween the manifolds and the center block and, if found necessary, suitable gaskets may be employed to provide sealed joints between the valve cages and the mani folds as well as between the valve cages and the 'center block. At their outer ends, the manifolds are contracted to form nipples 51, and screwed into thenipple of the manifold 44 is an intake pipe 52 while a similar discharge pipe 53 is screwed into the vnipple of the manifold 45. Any approved structure may "be provided for mounting the block 10 and rigidly securing the block stationary.

As will now be seen, when the rotor is turned, the'rollers 30 of the pistons will travel in the eccentric grooves 26 for reciprocating the pistons while the guides 24 will c'oact with the heads 28 of the piston rods for directing the pistons in their radial movement. The, pistons, will thus be limited to rectilinear travel and` as the pistons move outwardly within the'cylinders 11, fluid will be drawn into the cylinders through the intake manifold 44, valvecages 39, and passages 13. while, as the pistons;4

ndove inwardly within the Cylinders, the fluid will be forced out through the passages 14, valve cages 41, and discharge manifold 45. iff-desired, the block 10 may be and discharge passages communicating with said cylinders, intake and discharge valves associated with said passages.l pistons reciprocable in said cylinders, gl'iide members carried by the block to coact with the pistons 'for limiting the pistons to rectilinear travel, companion side plates mating to form a formed of aluminum andl steel lining sleeves rotor surrounding the center block and rotatable thereon, said lside plates defining an internal cavity accommodating said guide members, and means carried by the rotor to coact with the pistons for reciprocating thevpistons as the rotor is turned.

2. A rotary pump including a center block having radial cylinders and provided with intake and discharge passages communicating with said cylinders, intake and discharge valves associated with said passages,` pistons reciprocable in said cylinders. guide members fixed to the periphery ofthe block to coact with the pistons for limiting the pistons to rectilinear travel, mating side plates forming a rotor surrounding the block and rotatable thereon, said side plates being formed with eccentric grooves and dening an internal annular chamber accommodating said guide members,` pins carried by the pistons, and rollers journaled on said pinsA to travel in said grooves for reciprocating the pistons as ther'otor is turned.

. HARRY H. REX.

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